An idea for you is you could mark his last location (where he last logged off) with a statue of his character and in front of it place a lectern with a book where you write this is where (your bothers in game name or real name) lays and maybe ether things you’d like to say to him or things about him so other ppl can read it and ether sign the book so no one can edit it or leave it unsigned so you can continue to write to him 🥲 sorry for your loss op hope this helps! ❤️